I tried both the custom action URL as well as the default URL *.firebaseapp.com/__/auth/handler, but no luck.
Both cases show the same error on the screen after clicking the link.
![enter image description here](https://i.stack.imgur.com/DNgU1.png)
It says "The requested action is invalid."
Also I checked the console log, it says "Request is missing required data".
![enter image description here](https://i.stack.imgur.com/nPLoG.png)
I also checked my GCP admin panel, and make sure there is no restriction to the browser key.
![enter image description here](https://i.stack.imgur.com/zB9h6.png)
Where could possibly go wrong? Any help is appreciated ??
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…